LATE PERITONEAL METASTASIS IN A PATIENT WITH OSTEOSARCOMA

A 19-year-old man with a high-grade osteosarcoma of the femur, treated with neoadjuvant chemotherapy, surgery, and adjuvant chemotherapy suf fered from lung metastases 15 months after diagnosis. They were resect ed. Thirteen months later, he had vague abdominal complaints which, af ter analysis, proved to be caused by peritoneal metastasis. A review o f the literature, possible physiopathological mechanisms of increased occurrence of unusual metastases and the role of bone scintigraphy in the follow-up of patients with osteosarcoma are discussed.